Helppp! i’m not good in math ..

Mathematics

1 answer:

Scrat [10]4 years ago

4 0

Graph-A and graph-D could both accurately show the radioactivity of the sample as the weeks go by. The only difference is that 'A' had 20 units of radioactivity when the time began and 'D' had 40 units. But on both of them, any point on the graph is 1/2 the value of what it was a week earlier ... which is exactly what you expect.

The equation under graph-A is the correct equation of that graph. We don't know anything about the equation under graph-D, because it sank below the bottom of the picture and we can't see it.

The equation of graph-D is

R = 40 (1/2)^x .

If that's not what it says under graph-D, then D is wrong, and only A is a correct answer.

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ANSWER ASAP PLS 20 POINTS! Which graph represents the piecewise defined function? y= {3 if x<-2 0 if x=1 -1 if x>1

Otrada [13]

Answer:

It is the third option. (the one which has a black point at X=1, Y=1)

Step-by-step explanation:

For simplicity what you should do is, you should satisfy the second condition that is, y=0 if x=1.

Here only the third option is satisfying this condition.

Whenever there is is a white circle or a white point it means that the point does not satisfy the condition and the the function is not defined at that point. And the black point means that the circle is defined at that point and satisfies the condition.

Henceforth, the correct answer is the third option.

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4 years ago

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Marizza181 [45]

Answer:

elimination anyday

Step-by-step explanation:

there are two 3y terms so they cancel out when using elimination, mark me brainliest plz

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3 years ago

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Find the missing b for a trapezoid with a=68, h=4, b=21

MAVERICK [17]

We will have to use the formula for the area of a trapezoid on this problem, which is ( $b_1$ and $b_2$ are the bases of the trapezoid and $h$ is the height):